About 40% of people incarcerated at the Kettle Moraine Correctional Institution had active coronavirus cases as of Monday, according to Department of Corrections figures.
There were 437 active cases in the prisons' inmate population of 1,104 as of Friday.
The Oshkosh Correctional Institution reports another major outbreak with 341 active cases, according to the figures. The prison population was 1,964 on Friday, so about 17% of the inmate population had active coronavirus cases.
Overall, there have been 1,612 positive coronavirus tests in state prisons since the beginning of the pandemic. Those figures include 560 positive tests at Kettle Moraine and 360 at Oshkosh, the two highest numbers in the prison system. Some people who were ill have recovered. Some are no longer in prison.
Both Kettle Moraine and Oshkosh are medium security and both are significantly overcrowded.
"There are so many infected they have no clue what to do," an Oshkosh inmate wrote.
Gov. Tony Evers has significant power to reduce prison crowding, but has not used it.
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